2121461 has 2 divisors, whose sum is σ = 2121462. Its totient is φ = 2121460.

The previous prime is 2121443. The next prime is 2121479. The reversal of 2121461 is 1641212.

It is a balanced prime because it is at equal distance from previous prime (2121443) and next prime (2121479).

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 844561 = 1130^2 + 919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060730 + 1060731.

It is an arithmetic number, because the mean of its divisors is an integer number (1060731).

2^2121461 is an apocalyptic number.

It is an amenable number.

2121461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121461 is an equidigital number, since it uses as much as digits as its factorization.

2121461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 2121461 is about 1456.5236009073. The cubic root of 2121461 is about 128.4926691655.

Adding to 2121461 its reverse (1641212), we get a palindrome (3762673).

Subtracting from 2121461 its reverse (1641212), we obtain a square (480249 = 693²).

The spelling of 2121461 in words is "two million, one hundred twenty-one thousand, four hundred sixty-one".